Quote Originally Posted by Jeff_Mash View Post
I still cannot figure out WHY problem #1 is still happening: the coupon discount is being affected by something whenever it's used in a region with sales tax, even though I don't have sales tax being factored into my ot_coupon settings.
Man, I'm sorry for all these posts, but I find more information after I post something!

So the issue with Problem #1 doesn't seem to be related to tax, because I reproduced it on an order without tax.

Check out this example: Click image for larger version. 

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As you can see, it works fine with the one item (which qualifies for the discount). But when I add a second item which isn't part of the discount category, the 20% value isn't calculated correctly.

Any ideas?